CODEWITHSUNDEEP
pythontkinter
musicfiend122
musicfiend122

Reputation: 23

TypeError: callback() takes exactly 2 arguments (0 given)

I get this error every time I click a button using Tkinter. I'm not quite sure what it means that 0 arguments are given, because I thought that callback gives two arguments. Traceback of the error:

Exception in Tkinter callback Traceback (most recent call last): 
  File "C:\Python27\lib\lib-tk\Tkinter.py", line 1470, in call return self.func(*args)   
TypeError: callback() takes exactly 2 arguments (0 given)

Here is all my code related to callback

def callback(input_set, user_set):
    user_score = 0
    if len(input_set & user_set) == 0:
        user_score += len(input_set - user_set) * 2
    for multiplier, user_set in enumerate(user_sets, 1):
        user_score += len(input_set & user_set) * multiplier

    print "Congratulations, you've scored " + str(user_score) + " points!"

# Creates button to calculate score
self.button = Tkinter.Button(self, font="Arial", text="Click to get your score", 
                             width = 45, pady = 5, command = callback)
self.button.grid(column=0, row=3, sticky="", columnspan=2)

Upvotes: 1

Views: 7327

Answers (2)

Alok
Alok

Reputation: 2689

command = callback

here you have to give the args that you are passing to callback. Use command=lambda:callback(arg1,arg2)

where arg1 & arg2 are the arguments that you need to provide the called function

Upvotes: 2

Mairaj Khan
Mairaj Khan

Reputation: 359

In your given function def callback(input_set, user_set): , It takes two argument, I think when you click button using Tkinter, the two arguments are not passed into the callback function. you have to check that which arguments are passed into the function.

Upvotes: 2

Related Questions